Le 22/02/2010 22:02, Gilles PIETRI a écrit :
Le 22/02/2010 06:40, Nikola Ciprich a écrit :
Hi Gilles, maybe You have the same problem I experienced?
see http://www.mail-archive.com/kvm@xxxxxxxxxxxxxxx/msg28572.html
nik
Hi,
The linux headers do include the MADV_MERGEABLE settings, and the libc
is the debian one which happened to work fine earlier in this regard.
Anyway I still added the flags just to make sure, and nothing more happens.
Cheers,
Gilou
OK, I had a doubt, so I did it again, and made sure there wasn't a
chance for the MADV_* to be missing... And it was the issue actually..
Not sure what happened there, given the linux headers are here.. It
works fine finally, thanks Nikola for your pointer.
Regards,
Gilou
On Sun, Feb 21, 2010 at 10:35:06PM +0100, Gilles PIETRI wrote:
Hi,
I'm running a 2.6.32.7 kernel with KSM enabled (CONFIG_KSM=y), with
qemu-kvm 0.12.2 that has support for KSM (exec.c checks for
MADV_MERGEABLE)..
So I have KSM running, /sys/kernel/mm/ksm/run is at 1, and after a
few hours running a dozen of VMs, many of them running the same
OS/base image, I see no page being shared, KSM seems inactive.
Values are pretty much to their default value, and it seems KSM is
simply not working.. I see ksmd in the process list though, but here
are the sysfs values reported:
==> /sys/kernel/mm/ksm/full_scans <==
0
==> /sys/kernel/mm/ksm/max_kernel_pages <==
1027257
==> /sys/kernel/mm/ksm/pages_shared <==
0
==> /sys/kernel/mm/ksm/pages_sharing <==
0
==> /sys/kernel/mm/ksm/pages_to_scan <==
100
==> /sys/kernel/mm/ksm/pages_unshared <==
0
==> /sys/kernel/mm/ksm/pages_volatile <==
0
==> /sys/kernel/mm/ksm/run <==
1
==> /sys/kernel/mm/ksm/sleep_millisecs <==
20
Any clues?
Cheers,
Gilou
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